Improvement in lightning-rod couplings



. S. BRADLEY.

LIGHTNING-ROD COUPLING. No.176,769. Patented May 2, 1876.

Attorney UNITED STATEs PATENT OFFICE.-

SYLVESTER BRADLEY, on BLooMIN'GToN, ILLINOIS.

IMPROVEMENT lN LlGHTNlNG-RbD COUPLINGS.

Specification forming part of Letters Patent No. 176,769, dated May 2,1876; application filed October 4, 1875.

f To all whom it may concern:

Be it known that I, SYLVESTER BRADLEY, of Bloomington, in the county ofMcLean, and

in the State of Illinois, have invented certain new and usefulImprovements in Lightning- Rod Coupling; and do hereby declare that thefollowing is a full, clear, and exact description thereof, referencebeing had to the accompanying drawings, and to the letters of referencemarked thereon, making a part of this specification.

The nature of my invention consists in the construction andarrangementof a coupling for lightning-rods, as will be hereinafter morefully set forth.

- In order-to enable others skilled in the art to which my inventionappertains to make and use the same, I will now proceed to describe itsconstruction and operation, referring to the annexed drawing, in which-1 igure 1 shows two detached sections of lightning-rod with the couplingtherein. Fig. 2 is a longitudinal section of the same when coupledtogether. Fig. 3 is a perspective view of the coupling.

A and B represent two sections of a lightning-rod, constructed in any ofthe known and usual ways, and -to be connected together by means of acoupling constructed in the following manner:

The coupling consists of a male part, (J, and a female part, D, securedin the adjoining ends of the two sections A B. The male part (1 of thecoupling is, at its'inner end, made large enough to fit in and bepermanently secured to the end of the section A, the portion 0' ofsaid-part 0 extending beyond the section A,

being turned down of smaller diameter, as shown. The female part D ofthe coupling fits in and is secured to the end of the lightning-rodsection B, and has a central aperture for the passage of the part 0. Inthis aperture, on opposite sides, are longitudinal grooves 00 m for thepassage of pins (1 a, which project from opposite sides of the part 0near its end.

The inner end of the female partD is made with two inclines, I) b, asshown particularly in Fig. 3, so that'when the male part 0 G is insertedin the female part D and then turned around, the pins 11 a will move upsaid inclines b b, and bind the two parts of the coupling together, andthereby uniting the two sections In testimony that I claim the foregoingI have hereunto set my hand this 13th day of September, 1875. I

SYLV ESTER BRADLEY. Witnesses:

Tnos. SLADE, GEO. P. GILL.

